Telescopes

Telescopes like Hubble produce more detailed images than Earth-based telescopes because they are positioned above Earth's atmosphere, which can distort and blur images. This allows Hubble to capture sharper and clearer images of celestial objects. Additionally, Hubble's location in space enables it to observe wavelengths of light that are absorbed by Earth's atmosphere.

No, because nothing can escape the black hole, not even light. So without light, we can't see anything. but, we can see stars being stretched like spaghetti and then being sucked into the black hole.

If the telescope were placed in space (like hubble) the images would be greatly improved due to the lack of both atmosphere and ambient light, such as streetlights. The lack of atmosphere means that the light from distant objects need not travel through turbulent gases found in the atmosphere. this would eliminate the 'twinkling' of stars, and the lack of ambient light would result in much greater detail in the image.

The eyepiece lens acts like a magnifying glass looking at the image from the objective lens.

Images from outer space have to go through the atmosphere in order to reach telescopes based on Earth. The atmosphere can distort and block light and thus obscure the images. Telescopes based in space, such as the Hubble, don't deal with this limitation.

We might generally characterize something that radiates light energy as luminescent. There are different reasons materials or substances radiate light, and a term like bio-luminescentmight appear. There are organisms that generate light, like a firefly (to name one). The term radio-luminescent might refer to the something like the glow of radium, which was painted on aircraft instrument indicators so they could be seen in the dark. Radioactive decay is the source of the energy that creates the light in that case. There are "variations" like incandescent, which is the generation of light with thermal (heat) energy as its source. A "regular" light bulb does this (having converted electrical energy into thermal energy as a first step). The term fluorescent refers to the generation of light directly from the ionizing effects of electricity, and we know about fluorescent lights, too. We might also encounter a couple of other odd terms with "escent" at the end that speak to this property.

There are many stores both online and offline that offer telescopes for sale. Online you can look at stores such as Amazon to get good deals or you can try and get a second hand bargain from Ebay.

You can buy a refractometer through online please visit :

http://www.nationalmicroscope.com/

Several transparent medias do at some extend, made the light to bend, to slow the speed of light to a certain degree -or refracts-); water, paper, glycerin, immersion oil, glass (crown), glass (flint), zircon, diamond, lead sulfide

The three major functions are brighten, resolve, and magnify.

The larger the biggest lens or mirror in a telescope, called the primary, the more resolution and light gathering ability your telescope will have. Those are the two primary factors in determining how powerful a telescope is. Magnification is not a good indicator of usefulness, just so you know. A 60mm (2.4') telescope at 450X is totally useless. A 6 " telescope at 96X is much more usable. As far as being able to see stars, they are for the most part boring, except for multiple star systems with interesting color variations. The best star views would be of the clusters of stars out there. There are many. You can come across many in a night just by looking around. To get at least a half decent view of the stars in the sky, I would recommend a 6" Newtonian Reflector or bigger scope. Stepping down, if that is not in the budget, several companies make half decent 4½" Newtonian Reflectors. Down from that is the 80mm, 3.1 inch refractor. The eyepieces on the last two are usually horrible, so plan to spend another $40 to acquire a decent 9mm or 12.5mm Plossl eyepiece.

They make things seen at a length larger.

It would be reflection, if you are doing a study island test.

:)

It's definitely concave, and up until recent times, it was always parabolic. Modern

optical techniques, bordering in this contributor's view on the black magic, now

make it possible to make the mirror's 'figure' spherical, with the resulting ray

bundle then 'corrected' by more mirrors of various shapes later down the line.

Reflecting telescopes are far-and-away the most common. This is because the telescope can be smaller and lighter, and because lenses always absorb a little light while mirrors can be almost perfect reflectors.

about 1 arcminute, or 1/60 of a degree ;-)

which equates to about 1/3 mm at arm's length

"Optical", in this case, simply means that they work with light.

A smaller focal spot size (around 0.1 mm) is typically used for magnification views in mammography. This helps to improve image sharpness and detail, especially when focusing on smaller areas of interest such as microcalcifications or architectural distortions in breast tissue.

The first telescope was invented by Hans Lippershey, a Dutch eyeglass maker, in 1608. However, it's worth noting that Galileo Galilei was the first to use a telescope for astronomy observations.

On January 16, 1996, foam insulation caught fire during the construction of the Subaru Telescope on Mauna Kea. Three construction workers died of smoke inhalation and twelve more were hospitalized, at least three of them overnight. One worker was rescued from the observatory's roof by a fire helicopter. Two days later, authorities reported that the fire had apparently been started by a cutting torch.

A fourth worker died in a forklift accident during construction. There is a memorial to all four workers on the outside of the telescope dome at ground level, accessible to the public, and every January, Subaru staff place a temporary sign at the bottom of the Mauna Kea Access Road with their names and the saying, "Look Up And Remember."

There is a 3 metre radio telescope on the roof of Cardiff University. There is also an optical telescope at the site for the use of undergraduates.

Consider the origin of the word "eavesdrop" - it relates to the "eaves" of a house. A person wanting to overhear what was being said in a house (a spy) would conceal themselves in the "eaves" to listen.

a telescope

Easiest to do would be a RADIO telescope. Get lots of chicken wire or fine mesh wire, If you have an old 6-foot satellite dish , the kind most people call "BUDs", Big Ugly Dish, then you can use this for the basic form.

It would be at least theoretically possible to gather lots of clear glass bottles, and if you're a glass blower, it might be possible to make your own lens, or optical mirror. Telescope construction is a pretty well developed art, and there are lots of books on how to build your own telescope.

Because radiation at those wavelengths is absorbed in the atmosphere, and very little of it

ever reaches the ground. Operated on the ground, those telescopes would see almost nothing.